Bertrandt (ETR:BDT investor three-year losses grow to 54% as the stock sheds €32m this past week

If you love investing in stocks you're bound to buy some losers. But the last three years have been particularly tough on longer term Bertrandt Aktiengesellschaft (ETR:BDT) shareholders. Unfortunately, they have held through a 57% decline in the share price in that time. And the ride hasn't got any smoother in recent times over the last year, with the price 53% lower in that time. Even worse, it's down 18% in about a month, which isn't fun at all.

Since Bertrandt has shed €32m from its value in the past 7 days, let's see if the longer term decline has been driven by the business' economics.

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To paraphrase Benjamin Graham: Over the short term the market is a voting machine, but over the long term it's a weighing machine. One imperfect but simple way to consider how the market perception of a company has shifted is to compare the change in the earnings per share (EPS) with the share price movement.

Bertrandt saw its share price decline over the three years in which its EPS also dropped, falling to a loss. Since the company has fallen to a loss making position, it's hard to compare the change in EPS with the share price change. But it's safe to say we'd generally expect the share price to be lower as a result!

You can see below how EPS has changed over time (discover the exact values by clicking on the image).

Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here.

What About Dividends?

As well as measuring the share price return, investors should also consider the total shareholder return (TSR). The TSR is a return calculation that accounts for the value of cash dividends (assuming that any dividend received was reinvested) and the calculated value of any discounted capital raisings and spin-offs. So for companies that pay a generous dividend, the TSR is often a lot higher than the share price return. We note that for Bertrandt the TSR over the last 3 years was -54%, which is better than the share price return mentioned above. The dividends paid by the company have thusly boosted the total shareholder return.

A Different Perspective

Bertrandt shareholders are down 52% for the year (even including dividends), but the market itself is up 16%. Even the share prices of good stocks drop sometimes, but we want to see improvements in the fundamental metrics of a business, before getting too interested. Regrettably, last year's performance caps off a bad run, with the shareholders facing a total loss of 7% per year over five years. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. For example, we've discovered 2 warning signs for Bertrandt that you should be aware of before investing here.

Of course Bertrandt may not be the best stock to buy. So you may wish to see this free collection of growth stocks.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on German exchanges.

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.